The Roman Catholic Diocese of Luçon (Latin: Dioecesis Lucionensis; French: Diocèse de Luçon) is a diocese of the Latin Rite of the Roman Catholic Church in France. Its see is Luçon Cathedral, in the commune of Luçon. The diocese comprises the department of Vendée.
It was suppressed by the Concordat of 1801 and annexed to the Diocese of La Rochelle; however, its re-establishment was urged in the Concordat of 11 June 1817 and came into effect in 1821. The Diocese of Luçon then comprised the territory of the ancient diocese (minus a few parishes incorporated in the Diocese of Nantes) and almost all the former Diocese of Maillezais. The current bishop is Alain Castet, appointed on April 14, 2008
The monastery of Luçon was founded in 682 by Ansoald, Bishop of Poitiers, who placed it under the government of St. Philbert (616-684). The latter, being expelled from Jumièges, established the monastery of the Black Benedictines on the Isle of Her (Noirmoutiers), of which Luçon was at first a dependency, probably as a priory. The list of the abbots of Luçon begins about the middle of the eleventh century.
In 1317 Pope John XXII erected the Bishopric of Luçon and among the occupants of the see were:
1317–1334: Petrus (or Pierre) I. de La Veyrie
1334–1353: Renaud de Thouars
1354: Johannes I.
1354: Gualterus
1357: Guido
1373: Elias I.
1373–1387: Guillaume I. de La Rochefoucauld
1388: Etienne Loypelli
1409–1418: Paillard
1421–1427: Elias II. Martinelli
1427–1431: Guillaume II. de Goyon
1441: Johannes II. Fleury
?–1451: Nicolas Coeur, brother of the financier Jacques Cœur
?–1462: André de La Roche
?–1490: Nicolas II. Boutault
1491–1494: Mathurin de Dercé
1496–1514: Pierre II. de Sacierges
1517–1523: Ladislaus
1523-1524: Jean de Lorraine-Guise
1524–1527: Cardinal Louis de Bourbon
1527–1541: Milon d'Illiers
1553–1562: René I. de Daillon du Lude
1562–1573: Jean-Baptiste Tiercelin
1578–?: René II. de Salla
Jacques Duplessis-Richelieu
1595–1600: François I. Yver
1605: Alphonse-Louis du Plessis de Richelieu
1607 to 29 April 1624: Armand-Jean Cardinal du Plessis de Richelieu
1624–?: Aimeric de Bragelone
1637–1661: Pierre III. Nivelle
1661-1671 Nicolas Colbert, (8 Feb 1661 Appointed - 16 Jul 1671 Appointed, Bishop of Auxerre), brother of the minister Jean-Baptiste Colbert
1671–1699: Henri de Barillon (22 Nov 1671 Appointed - 6 May 1699 Died)
1699–1723: Jean-François de l'Escure de Valderil, Jean-François de Valderies de Lescure † (6 Jun 1699 Appointed - 23 May 1723 Died)
1723–1736: Michel-Roger de Bussin–Rabutin
1738–1758: Samuel-Guillaume de Verthamon de Chavagnac
1759–1775: Claude-Jacquemet Gautier
1775–1801: Marie-Charles-Isidore de Mercy, (17 Nov 1775 Appointed - 24 Oct 1801 Resigned), who emigrated during the Revolution and known for his instructions sent to his priests
René-François Soyer † (14 Nov 1817 Appointed - 5 May 1845 Died), assumed various disguises and during the Revolution exercised his ecclesiastical functions in the suburbs of Poitiers.
Jacques-Marie-Joseph Baillès † (15 Aug 1845 Appointed - 21 Feb 1856 Resigned)
François-Augustin Delamare † (5 Mar 1856 Appointed - 20 Feb 1861 Appointed, Archbishop of Auch)
Charles-Théodore Colet † (5 Jun 1861 Appointed - 25 Nov 1874 Appointed, Archbishop of Tours)
Jules François Lecoq † (11 Jan 1875 Appointed - 30 Jul 1877 Appointed, Bishop of Nantes)
Clovis-Nicolas-Joseph Catteau † (21 Aug 1877 Appointed - 28 Nov 1915 Died)
Gustave-Lazare Garnier † (27 May 1916 Appointed - 30 Jan 1940 Died)
Antoine-Marie Cazaux † (11 Oct 1941 Appointed - 4 Jul 1967 Resigned)
Charles-Auguste-Marie Paty † (4 Jul 1967 Succeeded - 25 Mar 1991 Retired)
François Charles Garnier (25 Mar 1991 Succeeded - 7 Dec 2000 Appointed, Archbishop of Cambrai)
Michel Léon Émile Santier (19 Jun 2001 Appointed - 4 Sep 2007 Appointed, Bishop of Créteil)
Alain Castet (14 Apr 2008 Appointed - )
